CVEs / CVE-2025-40536
CVE-2025-40536: SolarWinds Web Help Desk Security Control Bypass Vulnerability
- Known exploited in the CISA KEV catalog since 12 Feb 2026
- critical 9.8 CVSS 3.1 (NVD)
- EPSS 73.5% chance of exploitation in the next 30 days, higher than 99% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
SolarWinds Web Help Desk contains a security control bypass vulnerability that could allow an unauthenticated attacker to gain access to certain restricted functionality.
Description
SolarWinds Web Help Desk was found to be susceptible to a security control bypass vulnerability that if exploited, could allow an unauthenticated attacker to gain access to certain restricted functionality.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| SolarWinds Web Help Desk | 12.8.8 HF1 and below | — |
Exploitation
| In CISA KEV since | 12 Feb 2026 |
|---|---|
| Due date for US federal agencies | 15 Feb 2026 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. |
Severity
| CVSS 3.1 | 9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HScored by NVD |
|---|---|
| Weakness | CWE-693 |
References
- CVE-2025-40536 on NVD
- CVE-2025-40536 in the CISA KEV catalog
- https://documentation.solarwinds.com/en/success_center/whd/content/release_notes/whd_2026-1_release_notes.htm (cited by CISA)
- https://www.solarwinds.com/trust-center/security-advisories/CVE-2025-40536 (cited by CISA)
- https://documentation.solarwinds.com/en/success_center/whd/content/release_notes/whd_2026-1_release_notes.htm Release Notes
- https://www.solarwinds.com/trust-center/security-advisories/CVE-2025-40536 Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-40536 US Government Resource
- https://www.huntress.com/blog/active-exploitation-solarwinds-web-help-desk-cve-2025-26399 Third Party Advisory
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.